SMAR DFI302, User Manual, Page: 100 / 218

DFI302 - User’s Manual
10.8
DF1 - The Rack
DF1 - (Rack with 4 slots)
Description
A Rack is basically a plastic support for the IMB circuit that carries the connectors where the
Modules are plugged in. These connectors that fit the Modules are called Slots.
New racks can be added according to the project requirements. Up to 15 Racks are allowed. Racks
can be connected for Local I/O expansion using a flat cable (DF3 ~ DF7).
Remember that the distance between the first module and the last module of a DFI302 system,
expanded by Flat Cable can not be exceeded 20ft (6m).
Each Rack has a rotating switch to select the address. The possible addresses are
0, 1, 2, 3, 4, 5, 6,
7, 8, 9, A, B, C, D, and E.
Note that the “
F
” address is not allowed.
There are restrictions related to the module location on the Rack. The restrictions are as follows:
1.
The first Slot on Rack 0 is always reserved for the Power Supply Module.
2. The second Slot on Rack 0 is always reserved for the Processor Module.
3. All additional Power Supply needs to be placed in the slot 0 of the desired Rack (jumper W1 in
the Rack must be cut before plugging the PS).
4. The last Rack must have a terminator DF2 installed.
Technical Specifications
DIMENSIONS AND WEIGHT
Dimensions (W x H x D) 148.5 x 25 x 163 mm ; (5.85 x 0.98 x 6.42 in)
Weight 0.216 kg